Method and Apparatus for Interference Control

1. A method for a source cell in a handover procedure, comprising: determining restricted subframes in which signal transfer from the source cell to its served user equipments is restricted; and notifying information about the determined restricted subframes to a target cell, the determined restricted subframes being used for scheduling user equipments which are taking handover from the source cell to the target cell; wherein a number of restricted subframes is increased with a decrease of a number of user equipments served by the source cell.

2. The method of claim 1 , wherein there is physical cell identifier, PCI, collision between the source cell and the target cell.

3. The method of claim 1 , wherein the handover is triggered by a cell soft lock procedure.

4. The method of claim 1 , wherein in the restricted subframes, transmission of a common reference signal is eliminated.

5. The method of claim 4 , wherein in the restricted subframes, transmission of a primary and/or secondary synchronization signal is restricted.

6. The method of claim 1 , further comprising: transmitting the information about the determined restricted subframes to partial or all user equipments served by the source cell.

7. An apparatus for source cell in a handover procedure, comprising: a determining unit, configured to determine restricted subframes in which signal transfer from the source cell to its served user equipments is restricted; and a notifying unit, configured to notify information about the determined restricted subframes to a target cell, the determined restricted subframes being used for scheduling user equipments which are taking handover from the source cell to the target cell; wherein a number of restricted subframes is increased with a decrease of a number of user equipments served by the source cell.

8. The apparatus of claim 7 , wherein there is physical cell identifier, PCI collision between the source cell and the target cell.

9. The method of claim 7 , wherein the handover is triggered by a cell soft lock procedure.

10. The apparatus of claim 7 , wherein in the restricted subframes, transmission of a common reference signal is eliminated.

11. An apparatus for a target cell in a handover procedure, comprising: a receiving unit configured to receive, from a source cell, information about restricted subframes in which signal transfer from the source cell to its served user equipments is restricted; and a scheduling unit configured to schedule user equipments which are taking handover from the source cell in the restricted subframes; wherein a number of restricted subframes is increased with a decrease of a number of user equipments served by the source cell.

12. The apparatus of claim 11 , wherein there is physical cell identifier, PCI collision between the source cell the target cell.

13. The apparatus of claim 11 , wherein the handover is triggered by a cell soft lock procedure.

14. The apparatus of claim 11 , wherein in the restricted subframes, transmission of a common reference signal from the source cell is eliminated.

15. The apparatus of claim 11 is a base station.

16. A method for a target cell in a handover procedure, comprising: receiving, from a source cell, information about restricted subframes in which signal transfer from the source cell to its served user equipments is restricted; and scheduling (S 603 ) user equipments which are taking handover from the source cell in the restricted subframes; wherein a number of restricted subframes is increased with a decrease of a number of user equipments served by the source cell.

17. The method of claim 16 , wherein there is physical cell identified, PCI, collision between the source cell and the target cell.

18. The method of claim 16 , wherein the handover is triggered by a cell soft lock procedure.

19. The method of claim 16 , wherein in the restricted subframes, transmission of a common reference signal from the source cell is eliminated.